具有高负载质量和提升体积能量密度的可扩展电缆型锂离子超级电容器,ACS Sustainable Chemistry & Engineering

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具有高负载质量和提升体积能量密度的可扩展电缆型锂离子超级电容器
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-10-31 , DOI: 10.1021/acssuschemeng.0c05928
Wei Yuan ₁ , Shuai Zou ₁ , Xianbin Liu ₁ , Kaixi Liu ₁ , Chao Lv ₁ , Ping Xie ₁ , Yanhong Yin ₁ , Yesheng Li ₁ , Ziping Wu ₁

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由于令人印象深刻的灵活性和可缝制性，一维（1D）功率存储设备有望促进设备组装并为基于纺织品的可穿戴电子设备提供高效的电源。当前的一维设备受到较低的负载质量和电极之间有限的接触面积的限制，这导致令人满意的电化学性能和难以满足能量要求。在这项研究中，我们采用碳纳米管宏观薄膜（CMF）作为集电器薄膜，以装载用于制造电缆型锂离子超级电容器（CLiSc）的活性材料。活性物质（Li ₄ Ti ₅ O ₁₂碳纳米管纤维（CNF）的表面固定锚定在CMF表面，然后将电极耦合在碳纳米管纤维（CNF）的表面上。其结果是，电极实现的13.6毫克/ cm的高装载质量²为阴极和8.84毫克/厘米²为阳极，并将获得的CLiSc显示出高容量和优异的耐久性，14.1兆瓦时特别令人满意的体积能量密度/厘米³，比所有先前报道的超级电容器都高。令人鼓舞的结果归因于电极的锚定效应和较大的接触面积，可提供快速的电子/离子传输动力学。此外，CLiSc通常可以在各种实际服务条件下供电，例如弯曲，打结，编织以及串行或并行集成。此外，CLiSc可以方便地通过CNF与同一侧的电子设备连接，这方便了与电子设备的连接。这种新颖的CLiSc有望用于可穿戴电子设备中，而开创性的研究将为设计和准备用于同步电子设备爆炸性发展的最新功率存储设备开辟新的视野。

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Scalable Cable-Type Lithium-Ion Supercapacitors with High Loading Mass and Promotional Volumetric Energy Density

Due to the impressive flexibility and stitchability, one-dimensional (1D) power storage devices are promising in facilitating devices assembly and provide highly efficient power sources for textile-based wearable electronics. Current 1D devices are restricted by the lower loading mass and limited contact area between electrodes, which leads to dissatisfactory electrochemical properties and difficulty to meet the energy requirement. In this study, we employ carbon nanotubes macro film (CMF) as a current collector film to load active materials for fabricating cable-type lithium-ion supercapacitors (CLiSc). Active materials (Li₄Ti₅O₁₂ as anode and active carbon as cathode) are anchored on the surface of CMF and then the electrodes are coupled on the surface of carbon nanotubes fiber (CNF). As a result, the electrodes achieve a high loading mass of 13.6 mg/cm² for cathode and 8.84 mg/cm² for anode, and the obtained CLiSc exhibits high capacity and excellent durability, especially a satisfactory volumetric energy density of 14.1 mWh/cm³, which is higher than all of the previously reported supercapacitors. The inspiring results are attributed to the anchored effect and large contact area of electrodes, which deliver rapid electronic/ionic transport kinetics. Furthermore, the CLiSc can be normally powered in various kinds of actual service conditions, such as bent, knot, weave, and serial or parallel integration. In addition, the CLiSc could be expediently connected with electronics in the same side by the CNF, which is convenient for the connection with electronic devices. This novel CLiSc is expected to be used in wearable electronic devices, and the pathbreaking research will open a new view to design and prepare state-of-the-art power storage devices for synchronizing the exploding development of electronics.

更新日期：2020-11-16

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